2025 Vaccine Trials Group Christmas Update
As Christmas approaches, and we start to think about planning our festive break, it is a good time to reflect on the past year and what we have been able to achieve. We hope that this newsletter will be of interest to the families and supporters of the Vaccine Trials Group and the research we do.
Our studies in 2025 have spanned from immunising pregnant mothers to protect their newborn babies from RSV infection, a new treatment from toddlers having surgery for ear infections, children and adolescents getting boosters against whooping cough and new ways for protecting older adults from COVID-19 and influenza. We thank all our families and participants to allow us to undertake this important research. Following our previous trials of maternal RSV vaccination, we are very pleased to be studying the effectiveness of one of those vaccines now licensed, Abrysvo®, in children’s hospital across Australia. Preliminary results look very promising for reducing the number of babies being admitted to hospital with RSV infection and will be presented at an international conference in Rome in February 2026.
The epidemic of whooping cough (pertussis) has been felt in WA this year, with over 2000 notifications after starting in the eastern states in late 2023. Fortunately, most infants are protected by maternal whopping cough vaccination, although improving the duration of protection in babies and older children is still needed. We are happy to see that one of the whooping cough vaccines we recently studied in adults, a pertussis only vaccine called Pertagen, was recently approved by the European Medicines Agency as a booster for older children and adults. We hope it will also be registered in Australia in the near future. We have also seen another novel pertussis vaccine, given as a nasal spray, progress to phase 3 trials after a successful international trial in children. We hope this nasal spray vaccine will be more effective at decreasing the spread of the pertussis bacteria between children and adults.
We are also waiting anxiously for the results of the Optimum Study after recruiting almost a thousand babies across Australia to see if a whole cell whooping cough vaccine (containing an inactivated whole pertussis bacteria), has reduced the risk food allergy. An unexpected result of this study was published earlier this year showing that the babies who had whole cell vaccine also had better responses to the pneumococcal and Hib vaccines they had received at the same time, and we are now looking into the babies’ immune system to see what caused these improved responses and hopefully better protection. In another interesting study with colleagues in Adelaide, we found that babies who had been exposed to antibiotics at the time of birth or shortly afterwards did not respond as well to their pneumococcal and Hib vaccines, which was associated with changes to their gut microbiome (bacteria). The results of this study, published in the prestigious journal Nature, have led to a trial of probiotics in babies exposed to early antibiotics to see if it improves their vaccine responses. Importantly, none of this great research could be done without our VTG lab team that have been working hard to measure babies’ antibody responses to all their childhood vaccines in less than a drop of blood.
We’ve also been undertaking research to better understand additional ways we can protect against pneumococcal pneumonia, meningitis and sepsis (blood infection). We have just finished recruitment of babies in the Pneumo21 Study for a new vaccine which covers an additional strain to the recently introduced Prevenar20 vaccine. Thanks again to the families in Perth who have taken part of this important study, and we expect to be involved in more pneumococcal vaccine studies next year.
I would like to take this opportunity to thank all of our families, collaborators and colleagues for helping us do this vital research, and wish you all a relaxing and peaceful festive break and a happy New Year with family and friends. We look forward to working with you again in 2026.
Merry Christmas!
Professor Peter Richmond
Head of the Vaccine Trials Group